Trackball USB Mouse EM01 NL - Model: EM01 NL - Connection: USB - Color: Black - Features: Trackball - Included: User manual, USB cable Thank you for viewing. I am selling this mouse because I used it only once and it didn't suit my needs. There are no issues with the operation or condition of the mouse. Price negotiations are not possible. When shipping, I will carefully wrap the outer box with bubble wrap. Please understand and purchase accordingly.